Global Patent Index - EP 0204293 A1

EP 0204293 A1 1986-12-10 - Solenoid construction and method for making the same.

Title (en)

Solenoid construction and method for making the same.

Title (de)

Solenoidanordnung und ihr Herstellungsverfahren.

Title (fr)

Solenoide et sa méthode de fabrication.


EP 0204293 A1 (EN)


EP 86107429 A


US 74064085 A

Abstract (en)

A proportional solenoid has a fixed pole piece (39) and a movable armature (45), both fitted into the bore (52) of a guide tube (36) that provides the required concentricity between the fixed and movable pole pieces (39) and (45). One of the pole pieces has a cylindrical recess (56) and the other pole piece has a reduced diameter cylindrical nose (62) that is complementary to cylindrical recess (56). A radially inwardly facing frusto-conical surface (95) is formed in cylindrical nose (62) to be disposed within recess (56) of the other pole piece and provide a frusto-conical pole piece section producing a linear force-stroke curve.

IPC 1-7 (main, further and additional classification)

H01F 7/13; H01F 7/16

IPC 8 full level (invention and additional information)

H01F 7/13 (2006.01); H01F 7/16 (2006.01)

CPC (invention and additional information)

H01F 7/16 (2013.01); H01F 7/13 (2013.01); H01F 7/1607 (2013.01); H01F 2007/085 (2013.01)

Citation (search report)

Designated contracting state (EPC)


DOCDB simple family

US 4604600 A 19860805; CA 1254257 A 19890516; EP 0204293 A1 19861210; JP S61287108 A 19861217